<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片視圖區域 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="+activeIndex"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 左侧 tab 栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item prop="goods_name" label="商品名称">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item prop="goods_price" label="商品价格">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item prop="goods_weight" label="商品重量">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item prop="goods_number" label="商品数量">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择框 所有商品分类区域 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{
                  expandTrigger: 'hover',
                  label: 'cat_name',
                  value: 'cat_id',
                }"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="item"
                  v-for="(item, index) in item.attr_vals"
                  :key="index"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="uploadToken"
              :on-success="picPath"
              list-type="picture"
            >
              >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑区域 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="获取失败" />
    </el-dialog>
  </div>
</template>
    
<script>
export default {
  data() {
    return {
      activeIndex: "0",

      // 添加商品表单对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: "",
        attrs: [],
      },

      // 商品分类数据对象
      cateList: [],

      // 动态参数数据
      manyTableData: [],

      // 静态属性数据
      onlyTableData: [],

      // 动态参数 tag 数据
      attrVals: [],

      // 上传图片时的 token
      uploadToken: { Authorization: window.sessionStorage.getItem("token") },

      // 图片预览框隐藏与显示
      previewVisible: false,

      // 图片预览路径
      previewPath: "",

      // 表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "change" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取所有商品分类
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类失败");
      this.cateList = res.data;
      //   console.log(this.cateList);
    },

    // 保存选择商品分类的 分类id
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },

    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },

    // 点击面板事件
    async tabClick() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取参数失败");
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals === 0 ? [] : item.attr_vals.split(",");
        });

        this.manyTableData = res.data;
        // console.log(this.manyTableData);
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status !== 200) {
          this.$message.error("获取数据失败");
        }
        this.onlyTableData = res.data;
      }
    },

    // 点击图片触发的函数
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },

    // 删除图片触发的函数
    handleRemove(file) {
      const picIndex = this.addForm.pics.findIndex((i) => {
        i.pic === file.response.data.tmp_path;
      });
      this.addForm.pics.splice(picIndex, 1);
      // console.log(this.addForm);
    },

    // 图片的临时存放路径回调函数
    picPath(response) {
      const picPathObj = { pic: response.data.tmp_path };
      this.addForm.pics.push(picPathObj);
      // console.log(this.addForm);
    },

    // 添加商品发送请求
    add() {
      // 请求前表单预验证
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写表单必填项");
        }

        // 对 addForm 对象中 goods_cat 进行处理 转成服务器需要的字符串形式
        //深拷贝 addForm
        const cloneAddForm = JSON.parse(JSON.stringify(this.addForm));
        // console.log(cloneAddForm)
        cloneAddForm.goods_cat = cloneAddForm.goods_cat.join(",");
        // console.log(cloneAddForm.goods_cat)
        // 处理 addForm 中的 attrs 转成服务器需要的格式

        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(","),
          };
          this.addForm.attrs.push(newInfo);
          // console.log(newInfo)
        });

        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals };
          this.addForm.attrs.push(newInfo);
        });

        cloneAddForm.attrs = this.addForm.attrs;
        // console.log(cloneAddForm,this.addForm)
        // 发送网络请求
        const { data: res } = await this.$http.post("goods", cloneAddForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加商品失败");
        }
        this.$message.success("添加商品成功");
        this.$router.push('goods')
      });
    },
  },

  computed: {
    // 三级商品分类id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
    
<style lang='less' scoped>
.el-checkbox {
  margin: 0 10px 0;
}

.el-dialog img {
  width: 100%;
}

.addBtn {
  margin: 15px 0;
}
</style>